Electric power generation system

Abstract

To provide an electric power generation system which can generate electricity by an electric power generator without using fuel.SOLUTION: An electric power generation system 10 has a compressor 11, a heat exchanger 12, a turbine 15, an electric power generator 17, an expansion pit 20, a heat exchanger 65, a turbine 67, an electric power generator 69, a compressor 64, and an air separator 92 which processes and decomposes compressed-air having a temperature decreased in the heat exchanger 65 into nitrogen, oxygen, argon gas, and carbon dioxide.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a power generation system that generates electricity using a generator connected to a turbine.

Background Art

[0002] An example of a power generation system that rotates a turbine and generates electricity using a generator connected to the turbine is described in Patent Document 1. In the power generation system described in Patent Document 1, steam generated by burning fuel in a steam boiler reaches a steam turbine and rotates a generator to generate electricity. The steam that has expanded in the steam turbine is condensed in a condenser to become condensate, which is pressurized by a condensate pump and then heated in a feedwater heater. As this heating source, steam extracted from the steam turbine is used.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventor of the present application recognized the problem that in the power generation system described in Patent Document 1, it is necessary to burn fuel in a steam boiler.

[0005] An object of the present disclosure is to provide a power generation system capable of generating electricity using a generator without using fuel.

Means for Solving the Problems

[0006] This embodiment includes a compressor that discharges compressed air, a first heat exchanger that transfers the heat of the compressed air to water to generate steam, a first turbine that converts the thermal energy of the steam into rotational energy, a first generator that converts the rotational energy of the first turbine into electrical energy, a liquid air generator to which the air cooled to a low temperature in the first heat exchanger is sent and that expands the sent air to generate liquid air, a second heat exchanger that transfers heat to the liquid air sent from the liquid air generator to vaporize it, a second turbine that converts the thermal energy of the air obtained in the second heat exchanger into rotational energy, a second generator that converts the rotational energy of the second turbine into electrical energy, a second compressor that sends compressed air as a heat source for transferring heat to the liquid air in the second heat exchanger to the second heat exchanger, and an air separator that processes the compressed air whose temperature has decreased in the second heat exchanger and separates it into nitrogen, oxygen, argon gas, and carbon dioxide, thereby constituting a power generation system.

Advantages of the Invention

[0007] According to the power generation system of this embodiment, it is possible to generate electricity with a generator without using fuel.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0009] (Overview) The power generation system disclosed in this embodiment has a generator and a turbine connected to the generator, and does not use fuel in the process of generating the fluid that rotates the turbine. Hereinafter, some embodiments included in the power generation system will be described based on the drawings. In each drawing for explaining some embodiments of the power generation system, the same components are denoted by the same reference numerals, and repeated explanations are omitted.

[0010] (First Embodiment) The first embodiment of the power generation system is shown in FIG. 1. The power generation system 10 includes devices and equipment such as a compressor 11, heat exchangers 12, 13, 14, turbines 15, 16, generators 17, 18, a water storage pit 19, an expansion pit 20, pumps 21, 22, 23, a fan 24, etc. The power generation system 10 shown in FIG. 1 is a conceptual diagram, and the positional relationship between the devices constituting the power generation system 10 is not limited to that shown in FIG. 1. For example, the turbines 15, 16 are arranged above the water storage pit 19 in the direction of the action of gravity. The compressor 11 is an air machine having two suction ports 25, 26 and one discharge port 27. Further, the compressor 11 is driven by an electric motor. The electric motor is a prime mover that rotates when power is supplied. The compressor 11 pressurizes the air sucked from at least one of the two suction ports 25, 26 and discharges the compressed air from the discharge port 27. The discharge port 27 is connected to a passage 29.

[0011] The heat exchanger 12 has two inlets 30, 31 and two outlets 32, 33. The inlet 30 is connected to the outlet 33, and the inlet 31 is connected to the outlet 32. The inlet 30 is connected to the passage 29, and the inlet 31 is connected to the passage 34. The outlet 32 is connected to the passage 35, and the outlet 33 is connected to the passage 36. The heat exchanger 12 has a function of generating water vapor (gas) by transferring the heat of the compressed air sent from the compressor 11 to the inlet 30 to the water supplied from the inlet 31. The generated water vapor is sent from the outlet 32 to the passage 35. The compressed air whose temperature has decreased due to heat transfer is sent from the outlet 33 to the passage 36.

[0012] The turbine 15 is a steam turbine, and the turbine 15 has a rotating shaft with fixed blades, an inlet 37 and an outlet 38. The inlet 37 is connected to the passage 35, and the outlet 38 is connected to the passage 39. The turbine 15 is a device that converts the thermal energy of a gas, such as steam, into the rotational energy of the rotating shaft. The turbine 15 converts the high-temperature and high-pressure steam sent from the heat exchanger 12 to the inlet 37 into the rotational energy of the rotating shaft by spraying it onto the fixed blades and ejecting it. The steam sprayed onto the blades has its temperature decreased and is discharged from the outlet 38 to the passage 39.

[0013] The generators 17, 18 may be either DC generators or AC generators. The generators 17, 18 have, for example, a rotor, a stator, permanent magnets attached to the stator, and coils wound around the rotor. The rotor of the generator 17 is connected to the rotating shaft of the turbine 15, and the rotor of the generator 18 is connected to the rotating shaft of the turbine 16. When the generators 17, 18 are rotated, an electric current flows through the coils according to the principle of electromagnetic induction. Thus, the generators 17, 18 convert the rotational energy (mechanical energy) applied to the rotor into electrical energy and output it. The electric power generated by the generators 17, 18 is supplied to the power supply destination 40. The power supply destination includes, for example, secondary batteries, electrical appliances, and the like.

[0014] The water storage pit 19 is a tank that stores water as a compressible fluid. The water storage pit 19 has two outlets 41, 42, and a pump 21 is connected to the outlet 41. The pump 21 sucks water from the water storage pit 19 and pressurizes the sucked water and discharges it to the passage 34.

[0015] The expansion pit 20 is a device that reduces the pressure of compressed air by ejecting and expanding the compressed air into the container body and generates liquid air (liquefied air) at a low temperature of -140°C or lower. The expansion pit 20 includes, for example, a container body, a diaphragm provided inside the container body, a storage chamber formed in the container body by the diaphragm, and two inlets 43, 44 and an outlet 45 connected to the storage chamber. The container body is placed in a heat-insulated state. The air sent to the expansion pit 20 expands in volume to become liquid air. The inlet 43 is connected to the passage 36, and the inlet 44 is connected to the passage 46. Further, a pump 22 is provided. The pump 22 sucks in liquid air from the outlet 45 of the expansion pit 20 and discharges the sucked liquid air into the passage 47.

[0016] The heat exchanger 13 has two inlets 48, 49 and two outlets 50, 51. The inlet 48 is connected to the outlet 51, and the inlet 49 is connected to the outlet 50. The inlet 48 is connected to the passage 47, and the inlet 49 is connected to the passage 52. The outlet 50 is connected to the passage 46, and the outlet 51 is connected to the passage 53. The heat exchanger 13 transfers the heat of the air sent to the inlet 49 to the liquid air sent to the inlet 48 to vaporize it. The gas obtained in the heat exchanger 13, that is, the air, is sent from the outlet 51 to the passage 53. In the heat exchanger 13, the air whose temperature has decreased by transferring heat to the liquid air is sent from the outlet 50 through the passage 46 to the expansion pit 20.

[0017] The pump 23 sucks in the water in the water storage pit 19 from the outlet 42 and discharges the sucked water into the passage 54. The heat exchanger 14 has two inlets 55, 56 and two outlets 57, 58. The inlet 55 is connected to the outlet 57, and the inlet 56 is connected to the outlet 58. The inlet 55 is connected to the passage 54, and the inlet 56 is connected to the passage 59. The outlet 57 is connected to the water storage pit 19 via the passage 60, and the outlet 58 is connected to the inlet 49 via the passage 52.

[0018] The fan 24 is an air machine that inhales and discharges outside air, and the fan 24 is rotated by, for example, an electric motor. The air discharged from the fan 24 is sent to the inlet 56 through the passage 59. The heat exchanger 14 raises the temperature of the air by transferring the heat of the water sent to the inlet 55 to the air sent to the inlet 56. The air with the increased temperature is sent to the inlet 49 through the passage 52. In the heat exchanger 14, the water whose temperature has decreased due to heat transfer is returned from the outlet 57 through the passage 60 to the water storage pit 19.

[0019] The turbine 16 has the same configuration as the turbine 15 and has an inlet 61 and an outlet 62. The inlet 61 is connected to the passage 53, and the outlet 62 is connected to the suction port 26 of the compressor 11 through the passage 63. When high-temperature and high-pressure steam is sent from the heat exchanger 13 to the inlet 61, the turbine 16 rotates the rotating shaft on the same principle as the turbine 15. The steam sent to the turbine 16 decreases in temperature and vaporizes, and is discharged to the passage 63.

[0020] (Operation example of the first embodiment) The operation example of the power generation system 1 shown in FIG. 1 is as follows. When the compressor 11 is driven, the high-temperature and high-pressure compressed air discharged from the compressor 11 is sent to the inlet 30 of the heat exchanger 12 through the passage 29. Also, a part of the water in the water storage pit 19 is sucked into the pump 21, and the water discharged from the pump 21 is sent to the inlet 31 of the heat exchanger 12 through the passage 34.

[0021] In the heat exchanger 12, the heat of the compressed air sent to the inlet 30 is transferred to the water sent to the inlet 31, and steam is generated. The steam generated in the heat exchanger 12 is sent to the passage 35. Also, the compressed air whose temperature has decreased in the heat exchanger 12 is sent to the expansion pit 20 through the passage 36.

[0022] The rotating shaft of the turbine 15 is rotated by the thermal energy of the steam, and power generation is performed by the generator 17. The steam whose temperature has decreased in the turbine 15 is sent through the passage 39 to the water storage pit 19, and the temperature of the steam decreases and it liquefies (into water). Among the water in the water storage pit 19, the portion with a lower temperature accumulates downward, and the water in that portion with a lower temperature is sucked in by the pump 23 and pressurized by the pump 23 to pass through the passage 54 and is sent to the inlet 55 of the heat exchanger 14.

[0023] In the heat exchanger 14, the heat of the water sent to the inlet 55 is transferred to the air sent to the inlet 56, and the temperature of the air rises. The high-temperature air discharged from the heat exchanger 14 is sent through the passage 52 to the inlet 49 of the heat exchanger 13. The water whose temperature has decreased in the heat exchanger 14 is sent through the passage 60 to the water storage pit 19.

[0024] The pump 22 sucks in the liquid air in the expansion pit 20 and pressurizes the sucked liquid air and discharges it to the passage 47. The heat of the high-temperature air sent to the inlet 49 of the heat exchanger 13 is transferred to the liquid air sent from the passage 47 to the inlet 48 of the heat exchanger 13, and the liquid air is vaporized in the heat exchanger 13. The air whose temperature has decreased in the heat exchanger 13 is sent through the passage 46 to the expansion pit 20 and its temperature decreases to become liquid air.

[0025] The rotating shaft of the turbine 16 is rotated by the thermal energy of the air sent from the heat exchanger 13, and power generation is performed by the generator 18. The air whose temperature has decreased in the turbine 16 is sucked through the passage 63 into the suction port 26 of the compressor 11. When the compressor 11 sucks in air, the outlet 62 becomes a negative pressure, and the turbine efficiency of the turbine 16 is improved. The turbine efficiency represents what percentage of the amount of heat (theoretical work) given to the turbine 16 is converted into the output of the turbine 16. The electric power generated by the generator 18 is sent to the power supply destination 40. In the first embodiment of the power generation system 10, in generating the steam sent to the turbine 15 and the air sent to the turbine 16, it is not necessary to use fuel. Therefore, power generation can be performed by the generators 17 and 18 without using fuel.

[0026] (Second Embodiment) The second embodiment of the power generation system is shown in FIG. 2. The power generation system 10 includes a compressor 64, heat exchangers 65 and 66, turbines 67 and 68, and generators 69 and 70. The compressor 64 is an air machine having an inlet 71 and an outlet 72. The compressor 64 is driven by an electric motor. The inlet 71 is connected to a passage 73, and the outlet 72 is connected to a passage 74.

[0027] The heat exchanger 65 has two inlets 75 and 76 and two outlets 77 and 78. The inlet 75 is connected to the outlet 78, and the inlet 76 is connected to the outlet 77. The inlet 75 is connected to the expansion pit 20 via a passage 47, and the inlet 76 is connected to the compressor 64 via a passage 74. The outlet 77 is connected to a passage 79, and the outlet 78 is connected to a passage 80. The heat exchanger 65 transfers the heat of the high-temperature and high-pressure compressed air sent from the compressor 64 to the liquid air sent to the inlet 75 and vaporizes it. The air generated in the heat exchanger 65 is sent from the outlet 78 to the passage 80. The compressed air whose temperature has decreased due to heat transfer is sent from the outlet 77 to the passage 79.

[0028] The turbine 67 has the same configuration and function as the turbine 15 and has an inlet 81 and an outlet 82. The inlet 81 is connected to the passage 80, and the outlet 82 is connected to the passage 63. The generator 69 has the same configuration and function as the generator 17. The rotor of the generator 69 is connected to the rotating shaft of the turbine 67. When the turbine 67 is rotated by the thermal energy of the air sent from the heat exchanger 65, the generator 69 generates electricity, and the electricity generated by the generator 69 is supplied to the power supply destination 40. The air that has exited from the outlet 82 of the turbine 67 is sucked into the inlet 26 of the compressor 11 through the passage 63.

[0029] The heat exchanger 66 has two inlets 83, 84 and two outlets 85, 86. Inlet 83 is connected to outlet 85, and inlet 84 is connected to outlet 86. Inlet 83 is connected to passage 52, and inlet 84 is connected to passage 79. Outlet 85 is connected to passage 46, and outlet 86 is connected to passage 87. The heat exchanger 66 generates steam by transferring the heat of the high-temperature air sent to inlet 83 to the air sent to inlet 84. The generated steam is sent from outlet 86 to passage 87. The air whose temperature has decreased due to heat transfer is sent from outlet 85 to passage 46. Note that a pump 88 may be provided in passage 79. The pump 88 has a function of pressurizing the air exiting from outlet 77 and sending it to inlet 84.

[0030] The turbine 68 has the same configuration and function as the turbine 15, and has an inlet 89 and an outlet 90. Inlet 89 is connected to passage 87, and outlet 90 is connected to passage 73. The generator 70 has the same configuration and function as the generator 17. The rotor of the generator 70 is connected to the rotating shaft of the turbine 68. When the rotating shaft of the turbine 68 is rotated by the thermal energy of the steam sent from the heat exchanger 66, the generator 70 generates electricity, and the electricity generated by the generator 70 is supplied to the power supply destination 40. The air exiting from the outlet 90 of the turbine 68 is sucked into the suction port 71 of the compressor 64 through the passage 73.

[0031] (Operation example of the second embodiment) The operation example of the power generation system 10 shown in FIG. 2 is as follows. The heat exchanger 65 transfers the heat of the high-temperature and high-pressure compressed air sent from the compressor 64 to the liquid air supplied from the inlet 75 and vaporizes it. The air generated in the heat exchanger 65 is sent from the outlet 78 to the passage 80. The compressed air whose temperature has decreased due to heat transfer is sent from the outlet 77 to the passage 79. The turbine 67 is rotated by the air sent from the heat exchanger 65, and the electricity generated by the generator 69 is supplied to the power supply destination 40. The air exiting from the turbine 67 is sucked into the suction port 26 of the compressor 11 through the passage 63.

[0032] The heat exchanger 66 generates water vapor (gas) by transferring the heat of the high-temperature air sent to the inlet 83 to the air sent to the inlet 84. The generated water vapor is sent to the turbine 68. The air whose temperature has decreased due to heat transfer is sent from the outlet 85 to the passage 46. When the turbine 68 is rotated by water vapor, the electric power generated by the generator 70 is supplied to the power supply destination 40. The air discharged from the turbine 68 is sucked into the suction port 71 of the compressor 64. The power generation system 10 can transfer the heat of the compressed air discharged from the compressor 11 to water to generate water vapor, and can also transfer heat to the liquid air exiting from the expansion pit 20 to generate air. Therefore, power can be generated by the generators 17 and 70 without using fuel. Other operations of the second embodiment of the power generation system 10 are the same as those of the first embodiment of the power generation system 10.

[0033] (Third Embodiment) The third embodiment of the power generation system is shown in FIG. 3. The compressor 64 shown in FIG. 3 sucks outside air from the suction port 71 to generate compressed air and discharges the compressed air to the passage 74. The outlet 77 of the heat exchanger 65 is connected to the air separator 92 via the passage 91. The heat exchanger 14 does not have an inlet 56 and an outlet 58. The heat exchanger 14 transfers the heat of the water sent to the inlet 55 to the outside air to lower the temperature and discharges the water from the outlet 57. If the water storage pit 19 can be cooled by seawater or the like, the heat exchanger 14 and the pump 23 do not need to be provided.

[0034] (Operation Example of the Third Embodiment) The operation example of the power generation system 10 shown in FIG. 3 is as follows. The air discharged from the outlet 77 of the heat exchanger 65 is sent to the air separator 92. The air separator 92 is a device that can separate air and recover nitrogen, oxygen, argon gas, carbon dioxide, etc. by, for example, the cryogenic separation method. The specific process performed in the air separator 92 is specifically as follows.

[0035] First, after sucking air from the filter, it is compressed by a compressor to about 0.5 Mpa. Since the compressed air reaches about 80°C, the air is cooled to about 10°C in a water wash cooling tower. Then, moisture and carbon dioxide that solidify at low temperatures are adsorbed and removed by an adsorber, and the air introduced into the air separator 92 is cooled to about -200°C in a heat exchanger and liquefied, and then introduced into a rectifying column and distilled to separate using the difference in boiling points of each gas.

[0036] The power generation system 10 can transfer the heat of the compressed air discharged from the compressor 11 to water to generate steam, and transfer heat to the liquid air exiting from the expansion pit 20 to generate air. The turbine 15 is rotated by the thermal energy of steam, and the generator 17 generates electricity. The turbine 67 is rotated by the thermal energy of air, and the generator 69 generates electricity. Therefore, electricity can be generated by the generators 17 and 69 without using fuel. Other operations of the third embodiment of the power generation system 10 are the same as those of the second embodiment of the power generation system 10.

[0037] (Fourth Embodiment) The fourth embodiment of the power generation system is shown in FIG. 4. The power generation system 10 includes heat exchangers 94, 95, 96, turbines 97, 98, generators 99, 100, and a liquid nitrogen tank 131. The heat exchanger 94 has two inlets 101, 102 and two outlets 103, 104. The inlet 101 is connected to the outlet 103, and the inlet 102 is connected to the outlet 104. The inlet 101 is connected to the passage 47, and the inlet 102 is connected to the passage 105. The outlet 103 is connected to the passage 106, and the outlet 104 is connected to the passage 107.

[0038] The heat exchanger 94 transfers the heat of the gas sent to the inlet 102 to the liquid air sent to the inlet 101 to vaporize it. The air generated in the heat exchanger 94 is sent from the outlet 103 to the passage 106. In the heat exchanger 94, the air whose temperature has decreased due to heat transfer is sent from the outlet 104 to the passage 107. In the initial stage when the power generation system 10 starts operating, the temperature of the air passing through the passage 105 has not risen, and the heat of the outside air is transferred to the liquid air passing through the passage 106 to vaporize it. The outside air is at room temperature, for example, within the range of 15°C to 30°C.

[0039] The liquid nitrogen tank 131 is a tank that stores liquid nitrogen at -196°C in a non-hermetic state. The liquid nitrogen tank 131 has an inlet 108 and an outlet 109, and the inlet 108 is connected to the passage 107. A pump 111 is provided that sucks in liquid nitrogen from the outlet 109 and discharges it to the passage 110 under pressure.

[0040] The heat exchanger 95 has two inlets 112, 113 and two outlets 114, 115. The inlet 112 is connected to the outlet 114, and the inlet 113 is connected to the outlet 115. The inlet 112 is connected to the passage 106, and the inlet 113 is connected to the passage 110. The outlet 114 is connected to the passage 116, and the outlet 115 is connected to the passage 117. The heat exchanger 95 transfers the heat of the air sent to the inlet 112 to the liquid nitrogen sent to the inlet 113. The liquid nitrogen receives heat, its temperature rises, and it expands and vaporizes. The vaporized nitrogen gas is sent from the outlet 115 to the passage 117. The liquid air generated by the decrease in the temperature of the air in the heat exchanger 95 is sent from the outlet 114 to the inlet 120.

[0041] Turbine 97 has the same configuration and function as turbine 15 and has an inlet 118 and an outlet 119. Inlet 118 is connected to passage 117, and outlet 119 is connected to passage 105. Generator 99 has the same configuration and function as generator 17. The rotor of generator 99 is connected to the rotating shaft of turbine 97. When turbine 97 is rotated by the thermal energy of nitrogen gas, generator 99 generates electricity, and the electricity generated by generator 99 is supplied to power supply destination 40. The nitrogen gas exiting from outlet 119 of turbine 97 is sent through passage 105 to inlet 102 of heat exchanger 94. The heat of the nitrogen gas is transferred to the liquid air sent to inlet 101 and vaporizes, and is sent to passage 106. The nitrogen gas whose temperature has decreased in heat exchanger 94 exits from outlet 104 and returns to liquid nitrogen tank 131 through passage 107.

[0042] Heat exchanger 96 has two inlets 120, 121 and two outlets 122, 123. Inlet 120 is connected to outlet 122, and inlet 121 is connected to outlet 123. Inlet 120 is connected to passage 116, and inlet 121 is connected to passage 52. Outlet 122 is connected to passage 124, and outlet 123 is connected to inlet 44 of expansion pit 20 through passage 125. Heat exchanger 96 raises the temperature of the air by transferring the heat of the air sent to inlet 121 to the air sent to inlet 120. The air whose temperature has been raised in heat exchanger 96 is sent from outlet 122 to passage 124. In heat exchanger 96, the air whose temperature has decreased due to heat transfer is sent from outlet 123 through passage 125 to expansion pit 20 and becomes liquid air.

[0043] Turbine 98 has the same configuration and function as turbine 15 and has an inlet 126 and an outlet 127. The inlet 126 is connected to passage 124, and the outlet 127 is connected to compressor 11 via passage 63. Generator 100 has the same configuration and function as generator 17. The rotor of generator 100 is connected to the rotating shaft of turbine 98. When turbine 98 is rotated by the thermal energy of air, generator 100 generates electricity, and the electricity generated by generator 100 is supplied to power supply destination 40. The air discharged from outlet 127 of turbine 98 is sucked into the suction port 26 of compressor 11 through passage 63.

[0044] (Operation example of the fourth embodiment) The power generation system 10 shown in FIG. 4 transfers the heat of the compressed air discharged from compressor 11 to water to generate steam, sends the steam to turbine 15, and generates electricity with generator 17. Therefore, electricity can be generated by generator 17 without using fuel. Also, in the process of sending nitrogen gas to turbine 97 and the process of sending air to turbine 98, no fuel is used. Therefore, the power generation system 10 can generate electricity with generators 99 and 100 without using fuel.

[0045] Note that the power generation system 10 in FIG. 4 may be provided with a passage 128 that connects passage 29 and the inlet 102 of heat exchanger 94. Then, a part of the high-temperature and high-pressure compressed air discharged from compressor 11 is sent through passage 128 to the inlet 102 of heat exchanger 94. For this reason, at the initial stage when the power generation system 10 starts operating, or when the amount of heat of the air sent from turbine 97 to heat exchanger 94 is insufficient, the heat of the compressed air is transferred to the liquid air sent to the inlet 101 of heat exchanger 94, and the temperature of the liquid air rises. Therefore, it becomes easier to generate the nitrogen gas sent from heat exchanger 95 to passage 117.

[0046] Alternatively, the passage 128 may be connected to the inlet 112 of the heat exchanger 95. Then, a part of the high-temperature and high-pressure compressed air discharged from the compressor 11 is sent through the passage 128 to the inlet 112 of the heat exchanger 95. Therefore, at the initial stage when the power generation system 10 starts operating, or when the amount of heat of the air sent from the turbine 97 to the heat exchanger 94 is insufficient, the heat of the compressed air is transferred to the air sent to the inlet 112 of the heat exchanger 95, and the temperature of the air rises. Accordingly, it becomes easier to generate the nitrogen gas sent from the heat exchanger 95 to the passage 117.

[0047] (Fifth Embodiment) The fifth embodiment of the power generation system is shown in FIG. 5. In the power generation system 10, an air separator 92 is connected to the outlet 114 of the heat exchanger 95 via a passage 129. Also, the heat of the water sent to the inlet 55 of the heat exchanger 14 is dissipated into the atmosphere, and the temperature of the water decreases.

[0048] (Operation Example of the Fifth Embodiment) In the power generation system 10 shown in FIG. 5, the liquid air exiting from the outlet 114 of the heat exchanger 95 is sent through the passage 129 to the air separator 92. Also in the power generation system 10 shown in FIG. 5, similarly to the first embodiment, power can be generated by the generator 17 without using fuel. Further, the power generation system 10 shown in FIG. 5, similarly to the fourth embodiment, does not use fuel in the process of generating the nitrogen gas sent to the turbine 97. Accordingly, power can be generated by the generator 99 without using fuel. Furthermore, the liquid air exiting from the heat exchanger 95 is sent through the passage 129 to the air separator 92. Accordingly, air is separated by the air separator 92, and nitrogen, oxygen, argon gas, carbon dioxide, etc. can be recovered.

[0049] (Others) In each embodiment, the air that does not become liquid air in the heat exchanger 95 can also be recovered as solid carbon dioxide. Further, each passage disclosed in each embodiment is constituted by a metal pipe, a hole provided in the housing of the device, a hole provided in the housing of the equipment, etc.

[0050] An example of the technical meaning of the matters described in this embodiment is as follows. The power generation system 10 is an example of a power generation system. The compressor 11 is an example of a first compressor. The compressor 64 is an example of a second compressor. The heat exchanger 12 is an example of a first heat exchanger. The heat exchangers 13 and 65 are examples of a second heat exchanger. The turbine 15 is an example of a first turbine. The turbine 16 is an example of a second turbine. The turbine 97 is an example of a third turbine. The generator 17 is an example of a first generator. The generator 18 is an example of a second generator. The generator 99 is an example of a third generator. The expansion pit 20 is an example of a liquid air generator. The air separator 92 is an example of an air separator. The liquid nitrogen tank 131 is an example of a liquid nitrogen tank. The heat exchanger 95 is an example of a third heat exchanger. The water storage pit 19 is an example of a water storage pit. The passage 46 is an example of a first passage. The passage 63 is an example of a second passage.

Industrial Applicability

[0051] The present disclosure can be used as a power generation system that generates electricity with a generator connected to a turbine.

Explanation of Signs

[0052] 10…Power generation system, 11, 64…Compressors, 12, 13, 65, 95…Heat exchangers, 15, 16, 97…Turbines, 17, 18, 99…Generators, 19…Water storage pit, 20…Expansion pit, 46, 63…Passages, 92…Air separator, 131…Liquid nitrogen tank

Claims

1. A compressor that discharges compressed air, A first heat exchanger that transfers the heat of the compressed air to water to generate steam, A first turbine that converts the thermal energy of the steam into rotational energy, A first generator that converts the rotational energy of the first turbine into electrical energy, A liquid air generator to which the air cooled in the first heat exchanger is sent and which expands the sent air to generate liquid air, A second heat exchanger that transfers heat to the liquid air sent from the liquid air generator to vaporize it, A second turbine that converts the thermal energy of the air obtained in the second heat exchanger into rotational energy, A second generator that converts the rotational energy of the second turbine into electrical energy, A second compressor that sends compressed air as a heat source for transferring heat to the liquid air in the second heat exchanger to the second heat exchanger, An air separator that processes the compressed air whose temperature has decreased in the second heat exchanger and separates it into nitrogen, oxygen, argon gas, and carbon dioxide, A power generation system having the above components.

2. The power generation system according to Claim 1, A power generation system further provided with a water storage pit that holds water sent to the first heat exchanger and to which water obtained by the temperature decrease of the steam in the first turbine is sent from the first turbine.

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